After his show at the South London Gallery, Ryan Gander - that idiosyncratic man of mystery - is let loose on the Tate Collection to curate a personal response to the Gallery's acquisitions. For an artist fascinated by random acts it is, well, anyone's guess what he might choose to adorn the walls of the Art Now space, but you can be sure it will retain his love of chance. One of the chosen works is a photograph by Lucy Clout, featuring a woman leaning against a desk. The shot is framed so that her head is sliced off by a large black beam; an amusing, if irritating fixture, that denies us any access to the protagonists' persona. Tellingly, it's very Gander.